#include <stdio.h>

int main() {
    printf("size of vector? ");
    int vec_size = 0;
    scanf("%d", &vec_size);
    if(vec_size < 1 || vec_size > 100) {
        printf("Incorrect size of vector = %d\n", vec_size);
        return 1;
    }
    
    int vec[100];
    for(int i = 0; i < vec_size; i++) {
        printf("[%d]? ", i);
        scanf("%d", vec+i); // &vec[i]
    }
    
    int sum = 0;
    for(int i = 0; i < vec_size; i++) {
        sum += vec[i];
    }

    printf("Summa = %d\n", sum);
    return 0;
}